PBHS Chemistry I Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
elements found in groups 1A-7A are called ___________ | representative elements |
_______________ are the electrons found in the highest occupied energy level of an atom | valence electrons |
The ________ of valence electrons determines the chemical properties of the element | number |
To find the number of valence electrons in an atom, simply look at its ________________ | group number |
the elements in group 1A have ___ valence electron(s) | one |
the elements in group 2A have ___ valence electron(s) | two |
the elements in group 3A have ___ valence electron(s) | three |
the elements in group 4A have ___ valence electron(s) | four |
the elements in group 5A have ___ valence electron(s) | five |
the elements in group 6A have ___ valence electron(s) | six |
the elements in group 7A have ___ valence electron(s) | seven |
the elements in group 8A have ___ valence electron(s) | eight |
Valence electrons are usually the only electrons used in _____________ | chemical bonds |
Electron dot structures (sometimes called ___________ Structures) | Lewis Dot |
Electron dot structures are diagrams that show the valence electrons represented by ______ arranged around the chemical symbol | dots |
_______, such as neon and argon, are unreactive… that is they are stable | noble gases |
In 1916, Gilbert Lewis used the idea that noble gases were unreactive to come up with the ___________ | octet rule |
In forming compounds, elements tend to want to achieve the electron configuration of a noble gas which has ________ electrons in its outer electron shell | eight |
Recall that each noble gas has eight electrons in its highest energy level and a general electron configuration of _________ | ns2 np6 |
Atoms of metallic elements tend to ___________ their electrons to get to the stable configuration of ns2 np6 | lose |
Atoms of some non-metallic elements tend to ________ (ionic bond) or _______ (covalent bond) electrons to achieve an octet | gain or share |
An atom starts ____________ because it has the same number of positive protons and negative electrons | electrically neutral |
An atoms loss of valence electrons produces a ________ or a positively charged ion | cation |
the gain of a negatively charged electron by a neutral atom produces an ___________ | anion |
using a periodic table, p. 162 in your text, you can find that Beryllium (Be) has ____ valence electrons and most likely will have a _____ charge | two, +2 |
using a periodic table, p. 162 in your text, you can find that Sulfur (S) has ____ valence electrons and most likely will have a _____ charge | six, -2 |
Naming of ions Cations: use the ________ name of the element | unchanged |
Naming of ions Anions: change the ending of the element name to _______ | -ide |
Mixtures of two or more elements, one of which is a metal | alloy |
common alloy mixing copper and tin | bronze |
common alloy mixing iron and chromium | stainless steel |
Metallic Bonds The valence electrons of a metal can be modeled as a _______… they are mobile and can drift freely from one part of the metal to another | sea of electrons |
Metals are _________: they can be drawn into wires | ductile |
Metals are ____________: able to be hammered or forced into shapes | malleable |
The ___________ of an ion is the number of ions of opposite charge that surround an ion in a crystal | coordination number |
Most ionic compounds are _____________ at room temperature | crystalline solids |
Ionic compounds generally have ___________ melting points | high |
Ionic compounds can conduct an ____________ when melted or dissolved in water | electric current |
Lead(II) iodide (PbI2) or plumbous iodide is a _____________ at room temperature | yellow solid |
Lead(II) iodide (PbI2) or ____________ is a bright yellow solid at room temperature | plumbous iodide |
_______________ or plumbous iodide is a bright yellow solid at room temperature | Lead(II) iodide (PbI2) |
Lead iodide is _________ due to its lead content. | toxic |
In the nineteenth century Lead iodide was used as an artists' __________ under the name Iodine Yellow | pigment or paint |
Lead iodide can be obtained as a yellow precipitate by reacting solutions of ___________ and sodium iodide | lead(II) nitrate |
Lead iodide can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and _________________ | sodium iodide |
Lead iodide can be obtained as a ____________ by reacting solutions of lead(II) nitrate and sodium iodide | yellow precipitate |
_____________ can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and sodium iodide | lead iodide |
Pb(NO3)2 (aq) + 2NaI (aq) → PbI2 (s) + 2NaNO3 (aq) is the ______________ for the reaction in our lab | chemical equation |
in chemical formulas, always write the ___________ first | cation |
in chemical formulas, the ___________ goes after the ion it affects and tells how many of that ion is in that compound and only goes on the chemical formula (not the name) | subscript |
A ______________ is the lowest whole-number ratio of ions in an ionic compound | formula unit |
Anions and cations have ____________ charges and attract each other by means of electrostatic forces | opposite |
Anions and cations have opposite charges and attract each other by means of ________________ forces | electrostatic |
electrostatic forces are called ______________ | ionic bonds |
sodium (Na) has ________ valence electron and has a ________ charge; chlorine has _____ valence electrons and has a ______ charge; they form a compound with the formula _________ | 1, +1, 7, -1 NaCl |
NaCl is called _____________ | Sodium Chloride |
polyatomic ions are ions act as a single _______ with a charge over the whole ion | unit |
SO4 is an example of a _____________ ion and has a charge of _____ | polyatomic, -2 |
SO4 is called _____________ | sulfate |
NH4 is called _______________ and has a charge of _______ | ammonium, +1 |
the carbonate ion has a chemical formula of ________ and a charge of _______ | CO3, -2 |
Al+3 + 3Br-1 forms ___________ | AlBr3 |
Mg+2 ionically bonds with Cl-1 and forms a compound called ___________________ | magnesium chloride |
: Mg+2 ionically bonds with Cl-1 and forms a compound called Magnesium Chloride; the formula unit ratio Magnesium to Chloride is 1:2, so the chemical formula is written __________ | MgCl2 |
: Mg+2 ionically bonds with Cl-1 and forms a compound called Magnesium Chloride; the formula unit ratio Magnesium to Chloride is _________ so the chemical formula is written MgCl2 | 1:2 |
Ionic compounds are electrically __________(the plusses and the minuses equal out) | neutral |
more polyatomic fun: write the formula and charge for the hydroxide ion | OH, -1 |
more polyatomic fun: write the formula and charge for the nitrate ion | NO3, -1 |
write the compound name for Pb(NO3)2 | lead (II) nitrate |
write the compound name for NH4OH | ammonium hydroxide |
write the chemical formula for lead iodide | PbI2 |
write the chemical formula for Iron(II)Oxide , Iron (III) Oxide | FeO, Fe2O3 |
Created by:
kcshiker
Popular Chemistry sets